The goal of a sniper in CM is not to kill a lot of ennemies,he must try to only tagthem to help the babo on offence. The only moment when he kill people it is to avoid to be kill (when a smg run on you for example ).

He must take a good position to be able to come back on defence or to help on offence fastly. Be careful, when you snipe you must avoid to go in the ennemies' base because: =>It is hard to kill a smg/ft/sg/cg when you are close to him with a sniper. =>It is hard to go out of the base, and even harder for a sniper. =>When you are in the ennemies' base you cannot help on defence.

Moreover if you are alone in offence (in A), ennemies will spawn around you (yellow circle 1/2/3).

Take care of the spawn because you can sometimes shoot spwan if you control them well, and sometimes ennemies spawn in weird place that you must take care. Here on rawr you are on A, C and B are your friends, maybe foes will spawn in yellow circle. You must help the defender.

IMPORTANT: You are the middle, your job is to run in all the map to help with your powerful shot. So when the defender is fighting or ask for help you are the one who must go back on defence.

see it at 3min14sec, the sniper don't come back and dead on offence during that time the other team score.